Agriculture & Biology
soil properties
83%
prehistoric agriculture
83%
ecosystems
63%
dryland farming
60%
Sonoran Desert
58%
xerophytes
55%
ecologists
50%
soil texture
49%
nutrient availability
43%
water supply
43%
land use
40%
deserts
39%
plant communities
39%
farming systems
34%
texture
33%
irrigation
32%
rain
32%
environmental factors
26%
methodology
11%
Earth & Environmental Sciences
agricultural practice
91%
soil property
73%
desert
69%
ecosystem
49%
farming technique
45%
dryland farming
42%
annual plant
39%
soil process
33%
nutrient availability
31%
ecosystem process
30%
soil texture
29%
plant community
26%
community composition
25%
environmental change
23%
human activity
21%
irrigation
21%
texture
21%
agriculture
19%
land use
18%
rainfall
17%
water
8%
Chemical Compounds
Ecosystem
100%
Soil Texture
79%
Soil
70%
Nutrient
44%
Crystalline Texture
40%